Potassium Carbonate → 8-Methyl-2-(4-(2-methylallyloxy)phenethyl)benzo[f][1,7]naphthyridin-5-amine

HRID 340349Notes

Reaction equation

HRID 340349 reaction equation
[NH2:1][C:2]1[C:11]2[N:10]=[CH:9][C:8]([CH2:12][CH2:13][C:14]3[CH:19]=[CH:18][C:17]([OH:20])=[CH:16][CH:15]=3)=[CH:7][C:6]=2[C:5]2[CH:21]=[CH:22][C:23]([CH3:25])=[CH:24][C:4]=2[N:3]=1.C(=O)([O-])[O-].[K+].[K+].[CH2:32](Br)[C:33](=[CH2:35])[CH3:34]>CN(C)C=O.C(OCC)(=O)C.O>[CH3:25][C:23]1[CH:22]=[CH:21][C:5]2=[C:6]3[C:11](=[C:2]([NH2:1])[N:3]=[C:4]2[CH:24]=1)[N:10]=[CH:9][C:8]([CH2:12][CH2:13][C:14]1[CH:15]=[CH:16][C:17]([O:20][CH2:34][C:33]([CH3:35])=[CH2:32])=[CH:18][CH:19]=1)=[CH:7]3

Participants

7

Reactant 3

HCID 11430Potassium CarbonateHCID 3577853-Bromo-2-methyl-1-propeneHCID 582135504-(2-(5-Amino-8-methylbenzo[f][1,7]naphthyridin-2-yl)ethyl)phenol

Product 1

HCID 582135928-Methyl-2-(4-(2-methylallyloxy)phenethyl)benzo[f][1,7]naphthyridin-5-amine

Reagents, catalysts & solvents 3

HCID 962WaterSolventHCID 6228DimethylformamideSolventHCID 8857Ethyl AcetateSolvent

Conditions

Temperature
100 °C

Procedure

To a solution of 4-(2-(5-amino-8-methylbenzo[f][1,7]naphthyridin-2-yl)ethyl)phenol (from Example 170) (1.0 equiv.) in dimethylformamide (0.10 M) was added anhydrous potassium carbonate (1.5 equiv.) followed by methallyl bromide (1.2 equiv.). The resulting mixture was allowed to stir for 18 hours at 100° C. After cooling to ambient temperature, the mixture was diluted with ethyl acetate and water. The biphasic layers were separated and the aqueous layer was washed twice with ethyl acetate. The combined organic layers were dried over anhydrous Na2SO4 and the volatiles were removed in vacuo. The resulting residue was purified by a COMBIFLASH® system (ISCO) using 0-60% ethyl acetate in hexanes to provide 8-methyl-2-(4-(2-methylallyloxy)phenethyl)benzo[f][1,7]naphthyridin-5-amine as a solid. 1H NMR (Acetone-d6): δ 8.75 (s, 1H), 8.68 (s, 1H), 8.27 (d, 1H), 7.41 (s, 1H), 7.12-7.19 (m, 3H), 6.87 (d, 2H), 6.60 (br, 2H), 5.06 (s, 1H), 4.93 (s, 1H), 4.43 (s, 2H), 3.20 (t, 2H), 3.05 (t, 2H), 2.45 (s, 3H), 1.79 (s, 3H). LRMS [M+H]=384.2

Workup

  1. temperatureAfter cooling to ambient temperature
  2. customThe biphasic layers were separated
  3. washthe aqueous layer was washed twice with ethyl acetate
  4. dry with materialThe combined organic layers were dried over anhydrous Na2SO4
  5. customthe volatiles were removed in vacuo
  6. customThe resulting residue was purified by a COMBIFLASH® system (ISCO)

Sources & evidence

ORD record
ord-5180ecde928e4adaba6f129ceeba8771
Source dataset
uspto-grants-2014_11
Patent number
US08895577B2

Reaction notes

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